Wing for aeroplanes



June 24, 1924. 1,499,064

A. R. KUIPERS WING FOR AEROPLANES Filed Feb. 16. 1924 Cal Patented June24, 1924.

um'rao STATES ALBERT RUURD KUIPERS, OF RIJ'SWIJ'K, NETHERLANDS.

WING FOR AEROPLANES.

Application filed February 16, 1924. Serial No. 693,317.

To all whom it may concern.

Be it known that I, ALBERT Room) KUIP- ERS, a subject of the Queen ofthe Netherlands, residing at Rijswijk, Zuid-Holland, the Netherlands,have invented certain new and useful Improvements in WVings forAeroplanes, of which the following is a specification.

The present invention relates to a wing for aeroplanes and has for itsobject to increase the portative capacity of the wing. According to theinvention the wing, which at the upper and lower side is provided withair cushioning means, comprises passages bringing into communication theinterior of the air cushioning means with the atmosphere surrounding thewing and preferably these passages are so arranged that the interior ofthe air cushioning means under the wing is brought into communicationwith the atmosphere above the wing and the interior of the aircushioning means above the wing with the atmosphere in front of thewing.

In order that my invention will be more fully understood reference isdirected to the accompanying drawing, illustrating it by way of example.

The wing proper 1, which can be one of ordinary structure, is providedon the upperside with an elastic membrane 2 and the intervening space 3is filled with air under a higher pressure than the air of thesurrounding atmosphere. On the underside an elastic membrane 4 isprovided and the space 5 between these two is filled with air of lowerpressure than that of the surrounding atmosphere.

. To be able to retain their form, the elastic membranes may besupported by metallic sprlings or springs of other elastic mater1a Thedifferent pressures in both these spaces 5 and 3 can be maintainedmechanically, but they can also be maintained antomatically byconnecting those spaces through tubes 67 and 8-9 with the air outside.

When the aeroplane is in action, pressure is created on the front edgeand larefaction is obtained on the upperside of the wings. The tubes 67and 8-9 guarantee that in the space 3 the same pressure will. reign ason the front edge and for the same reason there will be a rarefaction inthe lower space 5.

By this arrangement the action of an aeroplane wing becomes somewhatsimilar to that of a birds wing. With an elastic upperside, above whichthere is a rarefaction, and with an elastic underside, underneath whichthere is pressure, the wing of the aeroplane is enabled to retain theenergy of the pressure pulsations which are con tinually propagatedupward from the surface of the earth.

There is no objection to divide the spaces into compartments, whichcompartments are then connected by separate tubes to the air outside; itis also preferable to have ridges in the material of the membranes, soas to diminish the lateral deviations of the air along the surface.

Having now particularly described and ascertained the nature of my saidinvention and the manner in which the same is to be performed, I declarethat what I claim as new and desire to secure by Letters Patent is:

1. A wing for aeroplanes comprising a high air pressure receiving andcushioning means at the upper side of the wing and a low air pressurereceiving and cushioning means at the under side of the wing, andpassages for conducting air into the interior of the air receiving andcushioning means.

2. A wing for aeroplanes comprising air cushioning means at the upper aswell as at the lower side of the wing, and passages, bringing intocommunication the atmosphere above the wing with the interior of the aircushioning means under the wing,

and bringing into communication the atmosphcre in front of the wing withthe interior of the air cushioning means above the wing.

3. A wing for aeroplanes comprising air cushioning means at the upper aswell as at the lower side of the wing, a covering of elastic materialfor said means, resilient means for keeping the covering in its desiredform and passages, bringing into communication the interior of the aircushioning means with the atmosphere outside the wing.

4. A wing for aeroplanes comprising air cushioning means at the upper aswell as at the lower side of the wing, partitions dielastic material forsaid means, ridges in said elastic material, and passages bringing intocommunication the interior of the air cushioning means with theatmosphere outside the Wing.

In testimony whereofIafiix my si ature.

ALBERT RUURD KUIP RS.

